How To Fix /SCMTMS/SCH133 - Update is not possible; &1 is referenced by an object that is locked

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCMTMS/SCH -

• Message number: 133

• Message text: Update is not possible; &1 is referenced by an object that is locked

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCMTMS/SCH133 - Update is not possible; &1 is referenced by an object that is locked ?

  The SAP error message /SCMTMS/SCH133 Update is not possible; &1 is referenced by an object that is locked typically occurs in the context of SAP Transportation Management (TM) when you attempt to update or change a scheduling object (like a shipment or transportation request) that is currently locked by another process or user. This locking mechanism is in place to prevent data inconsistencies and ensure that multiple users or processes do not modify the same object simultaneously.
  Cause:
  
  
  Object Locking: The object you are trying to update is locked by another user or process. This could be due to:
  
  Another user is currently editing the object.
  A background job is processing the object.
  The object is in a state that requires it to be locked (e.g., being processed or confirmed).
  
  
  
  Transaction Management: The system may have a transaction that is still active, which prevents changes to the object until the transaction is completed.
  
  
  Solution:
  
  
  Identify the Lock:
  
  Use transaction code SM12 to check for locks on the object. You can filter by the user or the object type to find out who or what is locking the object.
  If you find a lock that is no longer needed (e.g., a user has left the session), you can delete the lock entry if you have the necessary authorizations.
  
  
  
  Wait and Retry:
  
  If the lock is legitimate (e.g., another user is actively working on the object), you may need to wait until the other user completes their work and releases the lock.
  
  
  
  Communicate with Users:
  
  If you identify that another user is working on the object, communicate with them to understand their timeline for completing their changes.
  
  
  
  Check Background Jobs:
  
  If a background job is locking the object, you may need to wait for the job to complete or check the job status in transaction SM37.
  
  
  
  Review Custom Code:
  
  If you have custom developments that interact with the scheduling objects, ensure that they are not inadvertently causing locks.
  
  
  
  Related Information:
  
  Lock Management: Understanding how SAP handles locks can help in troubleshooting. Locks are typically managed at the database level, and SAP uses various lock modes (exclusive, shared) to control access.
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM37: To monitor background jobs.
  SE11: To check the data dictionary for the object type you are working with.
  
  
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to locking in your version of SAP TM.
  
  If the issue persists after following these steps, consider reaching out to your SAP Basis team or SAP support for further assistance.